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Visualization of turbulent flow with particles

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2 Author(s)
Hin, A.J.S. ; Fac. of Tech. Math. & Inf., Delft Univ. of Technol., Netherlands ; Post, F.H.

In this work a new method for visualization of three-dimensional turbulent flow using particle motion animation is presented. The method is based on Reynolds decomposition of a turbulent flow field into a convective and a turbulent motion. At each step of particle path generation a stochastic perturbation is added, resulting in random-walk motions of particles. A physical relation is established between the perturbations and the eddy-diffusivity, which is calculated in a turbulent flow simulation. The flow data used is a mean velocity field, and an eddy-diffusivity field. The erratic particle motions are more than just a visual effect, but represent a real physical phenomenon. An implementation of the method is described, and an example of a turbulent channel flow is given, which clearly shows the random particle motions in their context of general fluid motion patterns

Published in:

Visualization, 1993. Visualization '93, Proceedings., IEEE Conference on

Date of Conference:

25-29 Oct 1993